Seahawks DT Cassius Marsh to have MRI on knee UPDATED: With further notes from practice

Seattle rookie defensive lineman Cassius Marsh will have an MRI on his knee after leaving practice early today after tangling with a couple of teammates during a running drill.

The UCLA grad was praised for his play in the preseason opener against Denver, making the only sack for the Seahawks among four total tackles.

Marsh is competing for time at both defensive tackle and defensive end, playing in a role similar to that of Michael Bennett.

Marsh left practice and then returned to the field in street clothes.

The team announced afterward that he will have an MRI, so at the moment there is no word on the possible severity of his injury.

Also, receiver Percy Harvin, who left Tuesday’s practice after scraping his heel but then came back, had a good day of practice on Wednesday, according to quarterback Russell Wilson. “He made a lot of plays, did a lot of great things,” Wilson said.

UPDATE:

Here are a few other notes from practice:

— The team was not in pads with the team starting to taper down to Friday’s game.

— Safety Kam Chancellor again participated fully, continuing his progression from off-season hip surgery. He has continually worked more since returning to practice last week, though it remains unclear if he will play this week against the Chargers.

— The offensive line was again intact today, with center Max Unger, left tackle Russell Okung and left guard James Carpenter again working fully. As noted earlier, Pete Carroll said on KJR-AM today to expect to see Unger and Carpenter against the Chargers but not Okung.

— WR Kevin Norwood continues to sit out practice, though he was not in a walking boot today. Carroll had said last week there might be a chance Norwood could return this week. At this point, seems likely he wouldn’t be back until next week with the team having Saturday and Sunday off following Friday night’s game.

— No noticeable changes in the lineup.

— One off-the-radar player who continues to get a lot of work during practice is linebacker Marcus Dowtin, playing primarily weakside linebacker, where Kevin Pierre-Louis has been out. Pierre-Louis is now back and expected to play against the Chargers Friday.